(8+4)*(2+1)-18-8*(4-2)=x

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Solution for (8+4)*(2+1)-18-8*(4-2)=x equation: 


Simplifying
(8 + 4)(2 + 1) + -18 + -8(4 + -2) = x

Combine like terms: 8 + 4 = 12
(12)(2 + 1) + -18 + -8(4 + -2) = x

Combine like terms: 2 + 1 = 3
12(3) + -18 + -8(4 + -2) = x

Multiply 12 * 3
36 + -18 + -8(4 + -2) = x

Combine like terms: 4 + -2 = 2
36 + -18 + -8(2) = x

Multiply -8 * 2
36 + -18 + -16 = x

Combine like terms: 36 + -18 = 18
18 + -16 = x

Combine like terms: 18 + -16 = 2
2 = x

Solving
2 = x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
2 + -1x = x + -1x

Combine like terms: x + -1x = 0
2 + -1x = 0

Add '-2' to each side of the equation.
2 + -2 + -1x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1x = 0 + -2
-1x = 0 + -2

Combine like terms: 0 + -2 = -2
-1x = -2

Divide each side by '-1'.
x = 2

Simplifying
x = 2

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